Sarumaru Sarutani hails from a rural countryside home, living alongside his mother and five siblings. He boldly labels himself a "professional golfer" despite his amateur status, regularly wagering on matches at a local golf course using a driver he personally crafted.

Sarumaru's golfing prowess attracts Mr. X, the shadow leader manipulating sectors of the golf world. Seeking to recruit or control him, Mr. X sends subordinates to directly challenge Sarumaru. This conflict defines Sarumaru's core struggle: resisting external control while pursuing his golf ambitions. His path demands continuous technical growth as a golfer, strategic refinement, and forging alliances with comrades who aid his development.

Within the narrative of "Kōga Hikyō! Kage no Ninpō Golfer Sanjō!", Sarumaru and his family face a direct threat within a hidden valley of the Japanese Alps. Confronted by a trio specializing in golf-based assassination tactics, Sarumaru must defend his family using his golf skills in this isolated environment. This scenario exemplifies his broader battles against Mr. X's organization, which employs golfers trained in unconventional and antagonistic methods.

Across official media, including the foundational 143-episode TV series, Sarumaru's journey consistently depicts his evolution from a naturally gifted but undisciplined player into a more seasoned competitor. He navigates recurring opposition orchestrated by Mr. X's shadow golf organization, framing his progression through these confrontations.